It was a sarcastic comparison but it still had some truth in it. Let me explain.
Mainly what I see against the Nezha's deluxe is the fact it is too buffy for Nezha. It changes Nezha's model from slim and agile to buffy Amaterasu wannabe (it looks more Amaterasu than it should and that is another problem). Not only it looks silly to see such a buffy warrior with Nezha's animations of skills, the model also is downscalled to the height of original Nezha's model making it even more awkward because it looks forced. Nezha is described as petite and delicate (but still dangerous). Definitely the buffy part of the skin makes it more similar to Atlas than to Nezha, hence my comparison.
As for Atlas? Atlas' skin looks simply awful, the only good thing that I could say about it would be, indeed, it kind looks like having a stone layer. The overall concept looks more Eidolon than it should. The only difference is DE realized people would rage over another eidolon frame so instead of blue flame they added blue crystal inside. That made it even worse. Looks Play-doh made, is not polished, simply and utterly ugly in every single aspect of the design, especially the head that the only thing I could compare it to is Mouth Of Sauron from LoTR. Atlas has never been too pretty but with some help of Tennogen, pallets and good accessories he could be a pretty decently looking brawler/gladiator. But this skin? Degraded from a decent gladiator to a play-doh model with a disgusting face. In my opinion - the worst trade ever. Does it fit Atlas theme? Yes and no. It fits on the stone part. But stops to fit when you look at the details.
But hey, that is just my opinion, you don't have to agree with it. ^w^